<?php
# 文件名称:pagination.php
# MetInfo在线反馈系统 
# Copyright (C) 长沙米拓信息技术有限公司 (http://www.metinfo.cn). All rights reserved.
defined( '_SYS' ) or die( 'No direct script access allowed' );
class C_pagination
{
	/**
	 * The record number to start dislpaying from
	 *
	 * @access public
	 * @var int
	 */
	var $limitstart = null;
	/**
	 * Number of rows to display per page
	 *
	 * @access public
	 * @var int
	 */
	var $limit = null;
	/**
	 * Total number of rows
	 *
	 * @access public
	 * @var int
	 */
	var $total = null;
	/**
	 * View all flag
	 *
	 * @access protected
	 * @var boolean
	 */
	var $_viewall = false;
	/**
	 * Constructor
	 *
	 * @param	int		The total number of items
	 * @param	int		The offset of the item to start at
	 * @param	int		The number of items to display per page
	 */
	function C_pagination($total, $limitstart, $limit)
	{
		// Value/Type checking
		$this->total		= (int) $total;
		$this->limitstart	= (int) max($limitstart, 0);
		$this->limit		= (int) max($limit, 0);
		if ($this->limit > $this->total) {
			$this->limitstart = 0;
		}
		if (!$this->limit)
		{
			$this->limit = $total;
			$this->limitstart = 0;
		}
		if ($this->limitstart > $this->total) {
			$this->limitstart -= $this->limitstart % $this->limit;
		}
		// Set the total pages and current page values
		if($this->limit > 0)
		{
			$this->set( 'pages.total', ceil($this->total / $this->limit));
			$this->set( 'pages.current', ceil(($this->limitstart + 1) / $this->limit));
		}
		// Set the pagination iteration loop values
		$displayedPages	= 10;
		$this->set( 'pages.start', (floor(($this->get('pages.current') -1) / $displayedPages)) * $displayedPages +1);
		if ($this->get('pages.start') + $displayedPages -1 < $this->get('pages.total')) {
			$this->set( 'pages.stop', $this->get('pages.start') + $displayedPages -1);
		} else {
			$this->set( 'pages.stop', $this->get('pages.total'));
		}
		// If we are viewing all records set the view all flag to true
		if ($this->limit == $total) {
			$this->_viewall = true;
		}
	}
	/**
	 * Return the rationalised offset for a row with a given index.
	 *
	 * @access	public
	 * @param	int		$index The row index
	 * @return	int		Rationalised offset for a row with a given index
	 */
	function getRowOffset($index)
	{
		return $index +1 + $this->limitstart;
	}
	/**
	 * Return the pagination data object, only creating it if it doesn't already exist
	 *
	 * @access	public
	 * @return	object	Pagination data object
	 */
	function getData()
	{
		static $data;
		if (!is_object($data)) {
			$data = $this->_buildDataObject();
		}
		return $data;
	}
	/**
	 * Create and return the pagination pages counter string, ie. Page 2 of 4
	 *
	 * @access	public
	 * @return	string	Pagination pages counter string
	 */
	function getPagesCounter()
	{
		// Initialize variables
		$html = null;
		if ($this->get('pages.total') > 1) {
			$html .= C_text::_('Page')." ".$this->get('pages.current')." ".C_text::_('of')." ".$this->get('pages.total');
		}
		return $html;
	}
	/**
	 * Create and return the pagination result set counter string, ie. Results 1-10 of 42
	 *
	 * @access	public
	 * @return	string	Pagination result set counter string
	 */
	function getResultsCounter()
	{
		// Initialize variables
		$html = null;
		$fromResult = $this->limitstart + 1;
		// If the limit is reached before the end of the list
		if ($this->limitstart + $this->limit < $this->total) {
			$toResult = $this->limitstart + $this->limit;
		} else {
			$toResult = $this->total;
		}
		// If there are results found
		if ($this->total > 0) {
			$msg = C_text::sprintf('Results of', $fromResult, $toResult, $this->total);
			$html .= "\n".$msg;
		} else {
			$html .= "\n".C_text::_('No records found');
		}
		return $html;
	}
	/**
	 * Create and return the pagination page list string, ie. Previous, Next, 1 2 3 ... x
	 *
	 * @access	public
	 * @return	string	Pagination page list string
	 */
	function getPagesLinks()
	{
		//$lang =& JFactory::getLanguage();
		// Build the page navigation list
		$data = $this->_buildDataObject();
		$list = array();
		$itemOverride = false;
		$listOverride = false;
		$chromePath = PATH_THEMES.DS.'pagination.php';
		if (file_exists($chromePath))
		{
			require_once ($chromePath);
			if (function_exists('pagination_item_active') && function_exists('pagination_item_inactive')) {
				$itemOverride = true;
			}
			if (function_exists('pagination_list_render')) {
				$listOverride = true;
			}
		}
		// Build the select list
		if ($data->all->base !== null) {
			$list['all']['active'] = true;
			$list['all']['data'] = ($itemOverride) ? pagination_item_active($data->all) : $this->_item_active($data->all);
		} else {
			$list['all']['active'] = false;
			$list['all']['data'] = ($itemOverride) ? pagination_item_inactive($data->all) : $this->_item_inactive($data->all);
		}
		if ($data->start->base !== null) {
			$list['start']['active'] = true;
			$list['start']['data'] = ($itemOverride) ? pagination_item_active($data->start) : $this->_item_active($data->start);
		} else {
			$list['start']['active'] = false;
			$list['start']['data'] = ($itemOverride) ? pagination_item_inactive($data->start) : $this->_item_inactive($data->start);
		}
		if ($data->previous->base !== null) {
			$list['previous']['active'] = true;
			$list['previous']['data'] = ($itemOverride) ? pagination_item_active($data->previous) : $this->_item_active($data->previous);
		} else {
			$list['previous']['active'] = false;
			$list['previous']['data'] = ($itemOverride) ? pagination_item_inactive($data->previous) : $this->_item_inactive($data->previous);
		}
		$list['pages'] = array(); //make sure it exists
		foreach ($data->pages as $i => $page)
		{
			if ($page->base !== null) {
				$list['pages'][$i]['active'] = true;
				$list['pages'][$i]['data'] = ($itemOverride) ? pagination_item_active($page) : $this->_item_active($page);
			} else {
				$list['pages'][$i]['active'] = false;
				$list['pages'][$i]['data'] = ($itemOverride) ? pagination_item_inactive($page) : $this->_item_inactive($page);
			}
		}
		if ($data->next->base !== null) {
			$list['next']['active'] = true;
			$list['next']['data'] = ($itemOverride) ? pagination_item_active($data->next) : $this->_item_active($data->next);
		} else {
			$list['next']['active'] = false;
			$list['next']['data'] = ($itemOverride) ? pagination_item_inactive($data->next) : $this->_item_inactive($data->next);
		}
		if ($data->end->base !== null) {
			$list['end']['active'] = true;
			$list['end']['data'] = ($itemOverride) ? pagination_item_active($data->end) : $this->_item_active($data->end);
		} else {
			$list['end']['active'] = false;
			$list['end']['data'] = ($itemOverride) ? pagination_item_inactive($data->end) : $this->_item_inactive($data->end);
		}
		if($this->total > $this->limit){
			return ($listOverride) ? pagination_list_render($list) : $this->_list_render($list);
		}
		else{
			return '';
		}
	}
	/**
	 * Return the pagination footer
	 *
	 * @access	public
	 * @return	string	Pagination footer
	 */
	function getListFooter()
	{
		$list = array();
		$list['limit']			= $this->limit;
		$list['limitstart']		= $this->limitstart;
		$list['total']			= $this->total;
		$list['limitfield']		= $this->getLimitBox();
		$list['pagescounter']	= $this->getPagesCounter();
		$list['pageslinks']		= $this->getPagesLinks();
		$chromePath		= PATH_THEMES.DS.'pagination.php';
		if (file_exists( $chromePath ))
		{
			require_once( $chromePath );
			if (function_exists( 'pagination_list_footer' )) {
				return pagination_list_footer( $list );
			}
		}
		return $this->_list_footer($list);
	}
	/**
	 * Creates a dropdown box for selecting how many records to show per page
	 *
	 * @access	public
	 * @return	string	The html for the limit # input box
	 */
	function getLimitBox()
	{
		// Initialize variables
		$limits = array ();
		// Make the option list
		for ($i = 5; $i <= 30; $i += 5) {
			$limits[] = C_html::_('select.option', "$i");
		}
		$limits[] = C_html::_('select.option', '50');
		$limits[] = C_html::_('select.option', '100');
		$limits[] = C_html::_('select.option', '0', C_text::_('all'));
		$selected = $this->_viewall ? 0 : $this->limit;
		// Build the select list
		if (1) {
			$html = C_html::_('select.genericlist',  $limits, 'limit', 'class="inputbox" size="1" onchange="submitform();"', 'value', 'text', $selected);
		} else {
			$html = C_html::_('select.genericlist',  $limits, 'limit', 'class="inputbox" size="1" onchange="this.form.submit()"', 'value', 'text', $selected);
		}
		return $html;
	}
	/**
	 * Return the icon to move an item UP
	 *
	 * @access	public
	 * @param	int		$i The row index
	 * @param	boolean	$condition True to show the icon
	 * @param	string	$task The task to fire
	 * @param	string	$alt The image alternate text string
	 * @return	string	Either the icon to move an item up or a space
	 */
	function orderUpIcon($i, $condition = true, $task = 'orderup', $alt = 'Move Up', $enabled = true)
	{
		$alt = C_text::_($alt);
		$html = '&nbsp;';
		if (($i > 0 || ($i + $this->limitstart > 0)) && $condition)
		{
			if($enabled) {
				$html	= '<a href="#reorder" onclick="return listItemTask(\'cb'.$i.'\',\''.$task.'\')" title="'.$alt.'">';
				$html	.= '   <img src="images/uparrow.png" width="16" height="16" border="0" alt="'.$alt.'" />';
				$html	.= '</a>';
			} else {
				$html	= '<img src="images/uparrow0.png" width="16" height="16" border="0" alt="'.$alt.'" />';
			}
		}
		return $html;
	}
	/**
	 * Return the icon to move an item DOWN
	 *
	 * @access	public
	 * @param	int		$i The row index
	 * @param	int		$n The number of items in the list
	 * @param	boolean	$condition True to show the icon
	 * @param	string	$task The task to fire
	 * @param	string	$alt The image alternate text string
	 * @return	string	Either the icon to move an item down or a space
	 */
	function orderDownIcon($i, $n, $condition = true, $task = 'orderdown', $alt = 'Move Down', $enabled = true)
	{
		$alt = C_text::_($alt);
		$html = '&nbsp;';
		if (($i < $n -1 || $i + $this->limitstart < $this->total - 1) && $condition)
		{
			if($enabled) {
				$html	= '<a href="#reorder" onclick="return listItemTask(\'cb'.$i.'\',\''.$task.'\')" title="'.$alt.'">';
				$html	.= '  <img src="images/downarrow.png" width="16" height="16" border="0" alt="'.$alt.'" />';
				$html	.= '</a>';
			} else {
				$html	= '<img src="images/downarrow0.png" width="16" height="16" border="0" alt="'.$alt.'" />';
			}
		}
		return $html;
	}
	function _list_footer($list)
	{
		// Initialize variables
		$html = "<div class=\"list-footer\">\n";
		$html .= "\n<div class=\"limit\">".C_text::_('Display Num').$list['limitfield']."</div>";
		$html .= $list['pageslinks'];
		$html .= "\n<div class=\"counter\">".$list['pagescounter']."</div>";
		$html .= "\n<input type=\"hidden\" id=\"limitstart\" name=\"limitstart\" value=\"".$list['limitstart']."\" />";
		$html .= "\n</div>";
		return $html;
	}
	function _list_render($list)
	{
		// Initialize variables
		$html = null;
		// Reverse output rendering for right-to-left display
		$html .= '&lt;&lt; ';
		$html .= $list['start']['data'];
		$html .= ' &lt; ';
		$html .= $list['previous']['data'];
		foreach( $list['pages'] as $page ) {
			$html .= ' '.$page['data'];
		}
		$html .= ' '. $list['next']['data'];
		$html .= ' &gt;';
		$html .= ' '. $list['end']['data'];
		$html .= ' &gt;&gt;';
		return $html;
	}
	function _item_active(&$item)
	{
		global $mainframe;
		if ($mainframe->isAdmin())
		{
			if($item->base>0)
				return "<a title=\"".$item->text."\" onclick=\"javascript: document.adminForm.limitstart.value=".$item->base."; submitform();return false;\">".$item->text."</a>";
			else
				return "<a title=\"".$item->text."\" onclick=\"javascript: document.adminForm.limitstart.value=0; submitform();return false;\">".$item->text."</a>";
		} else {
			return "<a title=\"".$item->text."\" href=\"".$item->link."\" class=\"pagenav\">".$item->text."</a>";
		}
	}
	function _item_inactive(&$item)
	{
		global $mainframe;
		if ($mainframe->isAdmin()) {
			return "<span>".$item->text."</span>";
		} else {
			return "<span class=\"pagenav\">".$item->text."</span>";
		}
	}
	/**
	 * Create and return the pagination data object
	 *
	 * @access	public
	 * @return	object	Pagination data object
	 */
	function _buildDataObject()
	{
		// Initialize variables
		$data = new stdClass();
		$data->all	= new C_paginationObject(C_text::_('View All'));
		if (!$this->_viewall) {
			$data->all->base	= '0';
		}
		// Set the start and previous data objects
		$data->start	= new C_paginationObject(C_text::_('Start'));
		$data->previous	= new C_paginationObject(C_text::_('Prev'));
		if ($this->get('pages.current') > 1)
		{
			$page = ($this->get('pages.current') -2) * $this->limit;
			$page = $page == 0 ? '' : $page; //set the empty for removal from route
			$data->start->base	= '0';
			$data->previous->base	= $page;
		}
		// Set the next and end data objects
		$data->next	= new C_paginationObject(C_text::_('Next'));
		$data->end	= new C_paginationObject(C_text::_('End'));
		if ($this->get('pages.current') < $this->get('pages.total'))
		{
			$next = $this->get('pages.current') * $this->limit;
			$end  = ($this->get('pages.total') -1) * $this->limit;
			$data->next->base	= $next;
			$data->end->base	= $end;
		}
		$data->pages = array();
		$stop = $this->get('pages.stop');
		for ($i = $this->get('pages.start'); $i <= $stop; $i ++)
		{
			$offset = ($i -1) * $this->limit;
			$offset = $offset == 0 ? '' : $offset;  //set the empty for removal from route
			$data->pages[$i] = new C_paginationObject($i);
			if ($i != $this->get('pages.current') || $this->_viewall)
			{
				$data->pages[$i]->base	= $offset;
			}
		}
		return $data;
	}
	function get($property, $default=null)
	{
		if(isset($this->$property)) {
			return $this->$property;
		}
		return $default;
	}
	function set( $property, $value = null )
	{
		$previous = isset($this->$property) ? $this->$property : null;
		$this->$property = $value;
		return $previous;
	}
}
/**
 * Pagination object representing a particular item in the pagination lists
 *
 */
class C_paginationObject
{
	var $text;
	var $base;
	var $link;
	function C_paginationObject($text, $base=null, $link=null)
	{
		$this->text = $text;
		$this->base = $base;
		$this->link = $link;
	}
}
# 本程序是一个开源系统,使用时请你仔细阅读使用协议,商业用途请自觉购买商业授权.
# Copyright (C) 长沙米拓信息技术有限公司 (http://www.metinfo.cn). All rights reserved.
?>